Answer | Crossword Clue |
---|---|
homocercal | of fishes, having the upper and lower lobes of the tailfin alike |
heterocercal | (of a fish's tail) Having unequal upper and lower lobes, usually with the vertebral column passing into the upper |
anableps | small, surface-swimming fish, Anableps anableps, inhabiting shallow, muddy streams of Mexico and Central America, having each eye divided, with the upper half adapted for seeing in air and the lower half for seeing in water |